Derivative Financial Instruments Notional Amounts and Fair Values of Derivative Financial Instruments (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Foreign Currency Open Position	$ 500,000
Derivative, Fair Value, Net	9,261	6,281
Negative Fair Values [Member]
Asset (Liability) Fair Value	(811)	(7,090)
Interest Rate Lock Commitments [Member]
Asset (Liability) Fair Value	(1,667)	6,757
Interest Rate Lock Commitments [Member] \| Positive Fair Values [Member]
Notional Amount	91,417	314,416
Asset, Fair Value	1,011	6,912
Interest Rate Lock Commitments [Member] \| Negative Fair Values [Member]
Notional Amount	155,894	9,714
Liability, Fair Value	(2,678)	(155)
Forward Commitments [Member]
Asset (Liability) Fair Value	10,067	(208)
Forward Commitments [Member] \| Positive Fair Values [Member]
Notional Amount	260,203	79,152
Asset, Fair Value	10,067	707
Forward Commitments [Member] \| Negative Fair Values [Member]
Notional Amount	0	236,500
Liability, Fair Value	0	(915)
InterestRateSwapWithCustomer [Domain]
Asset (Liability) Fair Value	811	7,090
InterestRateSwapWithCustomer [Domain] \| Positive Fair Values [Member]
Notional Amount	76,421	130,841
Asset, Fair Value	2,417	7,090
InterestRateSwapWithCustomer [Domain] \| Negative Fair Values [Member]
Notional Amount	86,384	0
Liability, Fair Value	(1,606)	0
InterestRateSwapWithCounterparty [Domain] \| Positive Fair Values [Member]
Notional Amount	86,384	0
Asset, Fair Value	1,606	0
InterestRateSwapWithCounterparty [Domain] \| Negative Fair Values [Member]
Notional Amount	76,421	130,841
Liability, Fair Value	(2,417)	(7,090)
ForeignCurrencyForwardWithCustomer [Domain]
Foreign Currency Derivatives at Fair Value, Net	(42)	(211)
ForeignCurrencyForwardWithCustomer [Domain] \| Positive Fair Values [Member]
Notional Amount of Foreign Currency Derivative Instruments Not Designated as Hedging Instruments	11,826	1,810
Foreign Currency Contract, Asset, Fair Value Disclosure	269	137
ForeignCurrencyForwardWithCustomer [Domain] \| Negative Fair Values [Member]
Notional Amount of Foreign Currency Derivative Instruments Not Designated as Hedging Instruments	15,159	9,851
Foreign Currency Contracts, Liability, Fair Value Disclosure	(311)	(348)
ForeignCurrencyForwardWithCorrespondentBanks [Domain]
Foreign Currency Derivatives at Fair Value, Net	903	(57)
ForeignCurrencyForwardWithCorrespondentBanks [Domain] \| Positive Fair Values [Member]
Notional Amount of Foreign Currency Derivative Instruments Not Designated as Hedging Instruments	39,876	59,368
Foreign Currency Contract, Asset, Fair Value Disclosure	1,497	1,064
ForeignCurrencyForwardWithCorrespondentBanks [Domain] \| Negative Fair Values [Member]
Notional Amount of Foreign Currency Derivative Instruments Not Designated as Hedging Instruments	19,879	37,865
Foreign Currency Contracts, Liability, Fair Value Disclosure	$ (594)	$ (1,121)

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- Definition

Fair value of the assets less the liabilities of a derivative or group of derivatives.

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This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents contracts related to the exchange of different currencies, including foreign currency options, forward (delivery or nondelivery) contracts, and swaps entered into and existing as of the balance sheet date.

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Fair value as of the balance sheet date of foreign currency derivative assets, net of foreign currency derivative liabilities, which includes all such derivative instruments in hedging and nonhedging relationships that are recognized on the balance sheet.

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Fair value as of the balance sheet date of interest rate derivative liabilities, which includes all such derivative instruments in hedging and nonhedging relationships that are recognized as liabilities.

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Aggregate notional amount of all foreign currency derivatives not designated as hedging instruments. Notional amount refers to the number of currency units specified in the foreign currency derivative contract.

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